From patchwork Thu Oct 10 16:44:41 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nishanth Menon X-Patchwork-Id: 3017601 Return-Path: X-Original-To: patchwork-linux-omap@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id B2370BF924 for ; Thu, 10 Oct 2013 16:45:28 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 9CEC42030D for ; Thu, 10 Oct 2013 16:45:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6254520306 for ; Thu, 10 Oct 2013 16:45:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755998Ab3JJQpJ (ORCPT ); Thu, 10 Oct 2013 12:45:09 -0400 Received: from bear.ext.ti.com ([192.94.94.41]:37649 "EHLO bear.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755621Ab3JJQpH (ORCPT ); Thu, 10 Oct 2013 12:45:07 -0400 Received: from dflxv15.itg.ti.com ([128.247.5.124]) by bear.ext.ti.com (8.13.7/8.13.7) with ESMTP id r9AGiidh018472; Thu, 10 Oct 2013 11:44:44 -0500 Received: from DLEE70.ent.ti.com (dlee70.ent.ti.com [157.170.170.113]) by dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id r9AGiixx027058; Thu, 10 Oct 2013 11:44:44 -0500 Received: from dlep32.itg.ti.com (157.170.170.100) by DLEE70.ent.ti.com (157.170.170.113) with Microsoft SMTP Server id 14.2.342.3; Thu, 10 Oct 2013 11:44:44 -0500 Received: from localhost (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep32.itg.ti.com (8.14.3/8.13.8) with ESMTP id r9AGiiRf020286; Thu, 10 Oct 2013 11:44:44 -0500 From: Nishanth Menon To: =?UTF-8?q?Beno=C3=AEt=20Cousson?= , Rajendra Nayak CC: , , , , Nishanth Menon Subject: [PATCH] ARM: dts: omap4-panda-es: Do not reset gpio1 Date: Thu, 10 Oct 2013 11:44:41 -0500 Message-ID: <1381423481-5920-1-git-send-email-nm@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1381313521-10422-1-git-send-email-rnayak@ti.com> References: <1381313521-10422-1-git-send-email-rnayak@ti.com> MIME-Version: 1.0 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Spam-Status: No, score=-7.1 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Do not reset GPIO1 at boot-up because GPIO 7 in GPIO1 block is used on OMAP4460 PandaBoard-ES to select voltage register in TPS62361 which supplies VDD_MPU. Without this, OMAP4460 PandaBoard-ES boards fail to boot-up because MPU voltage switches over to VSET0 voltage value (boot voltage) which is not sufficient to operate the device at OPP100. Signed-off-by: Nishanth Menon --- As explained here: http://marc.info/?l=u-boot&m=133066647800872&w=2 GPIO1 reset causes PandaBoard-ES to stop functioning. This depends on Patch series from Rajendra: http://marc.info/?l=linux-doc&m=138131355520116&w=2 Applies on Benoit's for_13/dts branch: https://git.kernel.org/cgit/linux/kernel/git/bcousson/linux-omap-dt.git/log/?h=for_3.13/dts Tested on PandaBoard-ES without the u-boot uenv hack arch/arm/boot/dts/omap4-panda-es.dts | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/arm/boot/dts/omap4-panda-es.dts b/arch/arm/boot/dts/omap4-panda-es.dts index 56c4354..816d1c9 100644 --- a/arch/arm/boot/dts/omap4-panda-es.dts +++ b/arch/arm/boot/dts/omap4-panda-es.dts @@ -62,3 +62,7 @@ gpios = <&gpio1 8 GPIO_ACTIVE_HIGH>; }; }; + +&gpio1 { + ti,no-reset-on-init; +};